Clayton L Hopper

US Patent:

7453633, Nov 18, 2008

Filed:

Jun 2, 2005

Appl. No.:

11/143029

Inventors:

Clayton L Hopper - Canal Fulton OH, US
Kevin P McGrew - Canal Fulton OH, US

Assignee:

Astro-Tec Manufacturing, Inc - Canal Fulton OH

International Classification:

G03B 21/56
G03B 21/60
E04B 7/08

US Classification:

359451, 359459, 359443, 52 811

Abstract:

A perforate projection screen for movies, planetariums and the like having inconspicuous seams and uniform reflectivity throughout its visible surface. The screen is made from a plurality of perforate panels and is mounted, when in use, with a dark non-reflective chamber behind the screen. Any overlapped areas of the panels and any frame members or other objects, in close proximity to the back of the panels are covered with a black velour type material to prevent light reflection from panel holes where objects are in close proximity to the back of the panel. The edges of adjacent panels overlap to form seams with the overlapped edges of the panels being crimped to form recesses to receive the overlapping edge strip of an adjacent panel, thereby hiding the overlapping panel edge to reduce shadow lines and make the panel edges inconspicuous to viewers.

US Patent:

50112635, Apr 30, 1991

Filed:

May 11, 1990

Appl. No.:

7/522371

Inventors:

Clayton L. Hopper - Canal Fulton OH

Assignee:

Astro-Tec Manufacturing, Inc. - Canal Fulton OH

International Classification:

G03B 2156

US Classification:

350125

Abstract:

A perforate projection screeen for movies, planetariums and the like having uniform reflectivity throughout its visible surface. The screen is made from a plurality of perforate panels and is mounted, when in use, with a dark non-reflective chamber behind the screen. Any overlapped areas of the panels and any frame members or other objects, in close proximity to the back of the panels are covered with a black velour type material having vertically extending fibers to absorb the light rays entering the holes in those areas of the panels and thereby prevent light reflection from such holes which would cause undesirable light strips or areas to be visible in the overlapped portions of the screen or in the area of the screen where frame members or other objects are in close proximity to the back of the panel.